https://gcc.gnu.org/g:af7b84d0d02ffa23e4843e9555a888c9e80bd9b5
commit r16-645-gaf7b84d0d02ffa23e4843e9555a888c9e80bd9b5
Author: Richard Biener <rguent...@suse.de>
Date: Wed May 14 16:45:08 2025 +0200
Enhance -fopt-info-vec vectorized loop diagnostic
The following includes whether we vectorize an epilogue, whether
we use loop masking and what vectorization factor (unroll factor)
we use. So it's now
t.c:4:21: optimized: loop vectorized using 64 byte vectors and unroll
factor 32
t.c:4:21: optimized: epilogue loop vectorized using masked 64 byte vectors
and unroll factor 32
for a masked epilogue with AVX512 and HImode data for example. Rather
than
t.c:4:21: optimized: loop vectorized using 64 byte vectors
t.c:4:21: optimized: loop vectorized using 64 byte vectors
I verified we don't translate opt-info messages and thus excessive
use of %s to compose the strings should be OK.
* tree-vectorizer.cc (vect_transform_loops): When diagnosing
a vectorized loop indicate whether we vectorized an epilogue,
whether we used masked vectors and what unroll factor was
used.
* gcc.target/i386/pr110310.c: Adjust.
Diff:
---
gcc/testsuite/gcc.target/i386/pr110310.c | 4 ++--
gcc/tree-vectorizer.cc | 13 +++++++++++--
2 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/gcc/testsuite/gcc.target/i386/pr110310.c
b/gcc/testsuite/gcc.target/i386/pr110310.c
index dce388aeb206..60564393a2c9 100644
--- a/gcc/testsuite/gcc.target/i386/pr110310.c
+++ b/gcc/testsuite/gcc.target/i386/pr110310.c
@@ -9,5 +9,5 @@ void foo (int * __restrict a, int *b)
/* We should vectorize the main loop with AVX512 and the epilog with SSE. */
-/* { dg-final { scan-tree-dump "optimized: loop vectorized using 64 byte
vectors" "vect" } } */
-/* { dg-final { scan-tree-dump "optimized: loop vectorized using 16 byte
vectors" "vect" } } */
+/* { dg-final { scan-tree-dump "loop vectorized using 64 byte vectors" "vect"
} } */
+/* { dg-final { scan-tree-dump "loop vectorized using 16 byte vectors" "vect"
} } */
diff --git a/gcc/tree-vectorizer.cc b/gcc/tree-vectorizer.cc
index 447f882c5184..2f77e46ba992 100644
--- a/gcc/tree-vectorizer.cc
+++ b/gcc/tree-vectorizer.cc
@@ -1026,10 +1026,19 @@ vect_transform_loops (hash_table<simduid_to_vf>
*&simduid_to_vf_htab,
{
if (GET_MODE_SIZE (loop_vinfo->vector_mode).is_constant (&bytes))
dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, vect_location,
- "loop vectorized using %wu byte vectors\n", bytes);
+ "%sloop vectorized using %s%wu byte vectors and"
+ " unroll factor %u\n",
+ LOOP_VINFO_EPILOGUE_P (loop_vinfo)
+ ? "epilogue " : "",
+ LOOP_VINFO_USING_PARTIAL_VECTORS_P (loop_vinfo)
+ ? "masked " : "", bytes,
+ (unsigned int) LOOP_VINFO_VECT_FACTOR
+ (loop_vinfo).to_constant ());
else
dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, vect_location,
- "loop vectorized using variable length vectors\n");
+ "%sloop vectorized using variable length vectors\n",
+ LOOP_VINFO_EPILOGUE_P (loop_vinfo)
+ ? "epilogue " : "");
}
loop_p new_loop = vect_transform_loop (loop_vinfo,
